38 women with PCOS will be recruited from the PCOS clinic, weight management clinic, reproductive endocrinology clinic and through posters displayed at University Hospital Coventry and an e-poster displayed at the hospital intranet. Women with increased risk of OSA, based on the Berlin questionnaire and the Epworth Sleepiness Scale (ESS), will have home-based sleep studies performed. They will also be referred to the Respiratory Physician, as part of routine NHS care.